CHEN Lan zhou, LIU Yong ding, SONG Li rong. THE FUNCTION OF EXOPOLYSACCHARIDES OF MICROCOLEUS IN THE FORMATION OF DESERT SOIL[J]. ACTA HYDROBIOLOGICA SINICA, 2002, 26(2): 155-159.
Citation: CHEN Lan zhou, LIU Yong ding, SONG Li rong. THE FUNCTION OF EXOPOLYSACCHARIDES OF MICROCOLEUS IN THE FORMATION OF DESERT SOIL[J]. ACTA HYDROBIOLOGICA SINICA, 2002, 26(2): 155-159.

THE FUNCTION OF EXOPOLYSACCHARIDES OF MICROCOLEUS IN THE FORMATION OF DESERT SOIL

  • Received Date: November 19, 2000
  • Rev Recd Date: January 08, 2001
  • Published Date: March 24, 2002
  • The present work deals with the exopolysaccharides(EPS)and photosynthetic activities of Microcoleus vaginatus(one of the pioneer species in algal crusts at Shapotou, Linxia)With the concentration of EPS increasing, water holding capacity of desert soil was increasing,water evaporation was decreasing,and water movement through the desert soil was retarded The yield of exopolysaccharides was 28 82% of dry weight, and reached the maximum during the stationary phase Microcoleus had more carotenoid contents than other misted cells in view of its absorption spectrum;the most optimum temperature for photosynthesis was about 25℃, the most optimum light intensity for photosynthesis was 400μ Em-2·s-1, and photosynthetic activity was inhibited strongly after 0 3mol/l of NaCl; the value of Chlorophyll a fluorescence(Fv/Fm)recovered 96% of cultures after losing water to 56% of fresh weight It indicated that Microcoleus influenced the hydrological properties and played an important role in desert soil formation.
  • [1]
    Kunshan Gao.Chenses studies on the edible blue-green alga, Nostoc flagelliforme:a review [J].J.Appl.phycol,1998,11.37-49[2] Zebo Huang,Yongding Liu et al.Studies on polysaccharides from three edible species of nostoc(Cyanobacteria)with different colony morphologies: comparison of monosaccharide compositions and viscosities of polysaccharides from field colonies and suspension cultures [J].J.phycol,1998,34,962-968[3] 李敦海,宋立荣,刘永定.葛仙米光合活性对盐胁迫的反应[J].水生生物学报,1999,23(5):420-424[4] 李新荣,张景光.干旱沙漠区土壤微生物结皮及其对固沙植被影响的研究[J].植物学报,2000,42(9):965-970[5] 胡春香,刘永定,宋立荣.宁夏沙坡头地区藻类及其分布[J].水生生物学报,1999,23(5):443-448[6] Don Bailey,Andrew P.M,James R R.Aggregation of soil particles by algae[J].J.Phycol,1973,9,99-101[7] Savory A. Holistic resource management[M].Island Press,Covelo Califorlia,1988,564[8] 陈荷生.沙坡头地区生物结皮的水文物理特点及其环境意义[J].干旱区研究,1992,9(1):31-38[9] 胡春香,刘永定,宋立荣.荒漠藻壳的精细结构与发育[J].水生生物学报,2000,24(1):11-18

    Kunshan Gao.Chenses studies on the edible blue-green alga, Nostoc flagelliforme:a review [J].J.Appl.phycol,1998,11.37-49[2] Zebo Huang,Yongding Liu et al.Studies on polysaccharides from three edible species of nostoc(Cyanobacteria)with different colony morphologies: comparison of monosaccharide compositions and viscosities of polysaccharides from field colonies and suspension cultures [J].J.phycol,1998,34,962-968[3] 李敦海,宋立荣,刘永定.葛仙米光合活性对盐胁迫的反应[J].水生生物学报,1999,23(5):420-424[4] 李新荣,张景光.干旱沙漠区土壤微生物结皮及其对固沙植被影响的研究[J].植物学报,2000,42(9):965-970[5] 胡春香,刘永定,宋立荣.宁夏沙坡头地区藻类及其分布[J].水生生物学报,1999,23(5):443-448[6] Don Bailey,Andrew P.M,James R R.Aggregation of soil particles by algae[J].J.Phycol,1973,9,99-101[7] Savory A. Holistic resource management[M].Island Press,Covelo Califorlia,1988,564[8] 陈荷生.沙坡头地区生物结皮的水文物理特点及其环境意义[J].干旱区研究,1992,9(1):31-38[9] 胡春香,刘永定,宋立荣.荒漠藻壳的精细结构与发育[J].水生生物学报,2000,24(1):11-18
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